Molecular bonding
What type of bond is formed when electrons are shared between atoms?
covalent bonds
What are the products when hydrochloric acid reacts with sodium hydroxide?
water and sodium chloride
What is the first step in finding an empirical formula?
convert mass /% to moles
What is stoichiometry used to calculate in a chemical reaction?
amounts of reactants or products
What is the purpose of a titration?
to determine the concentration of an unknown solution
What kind of bond forms between a metal and a nonmetal?
Ionic bonds
What type of reaction is this: Zn + CuSO₄ →
single displacement reaction
A compound contains 40% carbon, 6.7% hydrogen, and 53.3% oxygen. What is the empirical formula?
What is CH₂O?
How many moles of water are produced from 2 moles of hydrogen gas reacting with oxygen?
2 moles
what is the name of the solution with a known concentration used in a titration?
the titrant
In a polar covalent bond, which atom has a partial negative charge?
Electromagnetic atom
Predict the products of this combustion reaction: C₃H₈ + O₂ →
CO₂ and H₂O
The empirical formula is always the same as the molecular formula.
false
In the reaction 2H₂ + O₂ → 2H₂O, how many grams of H₂O are produced from 4g of H₂?
36g
What is the name of the point in a titration where the indicator changes color?
the endpoint
What shape does a molecule with 4 bonding pairs and no lone pairs take?
tetrahedral
What are the products of a double displacement reaction between AgNO₃ and NaCl?
AgCl and NaNO₃
If the empirical formula is CH and the molar mass is 78 g/mol, what is the molecular formula?
C₆H₆
What is the limiting reactant if 5g of H₂ reacts with 40g of O₂ in 2H₂ + O₂ → 2H₂O?
hydrogen
In an acid-base titration, what happens at the equivalence point?
the moles of acid equal the moles of base
Which molecule is an example of a compound that does not follow the octet rule, and why?
BF(3) because the boron atom is stable with only 6 valence electrons
What must you check when predicting the product of a precipitation reaction?
the solubility of the possible products
A compound has 70% iron and 30% oxygen by mass. What is the empirical formula?
Fe₂O₃
If a reaction has a theoretical yield of 10g and an actual yield of 8g, what is the percent yield?
80%
If 25.0 mL of 0.10 M NaOH is needed to neutralize 50.0 mL of HCl, what is the concentration of HCl?
0.050 M